Larger passive heatsink

I noticed an earlier thread from July mentioned that a larger 13mm passive heatsink was being developed for the Up Board (possibly giving ~90% max performance). The new heatsink should be a really good fit for my application.

Is the larger heatsink now shipped standard instead of the original 8mm heatsink? Or is it still planned?

Fortunately, from my tests the Up Board handles 100% CPU load on all cores (compression/decompression/compilation/common server tasks) with only a +12/13C increase, nowhere near the limit where it will reduce clock speed. Perhaps something designed to thermally stress the CPU might find the limit, but I haven't found it for my use cases. No active cooling required.